Update to Report 147. The climate data in the ACROS tool is outdated and requires update. The original publication is based on data from prior to 2013; weather and climate data has been continually updated since the original publication was released (which affects the likelihood and severity of various risks in the assessment tool). Additionally, there are more recent examples of airport case studies and best practices. This research update idea was developed as part of project ACRP 11-02/39, Environmental Products Update and is one of the priorities identified by the research team and through industry outreach.